Monday, 14 November 2011

Question 1. Answer the following questions.Q(i).Which are the two factors on which the growth of vegetation mostly depends?Answer.Two factors on which the growth of vegetation depend are : (i) temperature and (ii) moisture.

Q(ii). Which are the three broad categories of natural vegetation?Answer.

The three broad categories of Natural Vegetation

(i) Forest

(ii) Grassland

(iii) Thorny shrubs and scrubs

Q(iii). Name the two hardwood trees commonly found in tropical evergreen forest.Answer.(i) Rosewood and (ii) ebony.

Q(iv). In which part of the world tropical deciduous forest is found?Answer. Deciduous forests are found in the large part of India, northern Australia and in central America.

Q(vi). Write the uses of coniferous forest.Answer. (a) Wood is used to make pulp, which is useful for making paper, newsprint and card board
(b) To make matchbox.
(c) Decorative pieces.
(d) To make packing box.
(e) To make particle board and plywood

Q(vii). In which part of the world seasonal grassland is found?Answer.Seasonal grassland are found in the mid-latiudinal zones and in the interior parts of the continents.

Question 4.Give resons.Q(i) The animal is polar region have thick fur and thick skin?Answer. The animal is polar region have thick fur and thick skin to protect themselves from the cold climatic conditions.

Q(ii).Tropical deciduous trees shed their leaves in the dry season.Answer: Tropical deciduous trees shed their leaves in the dry season to conserve water.

Q(iii).The type and thickness of vegetation changes from place to place.Answer: The type and thickness of vegetation changes from place to place, because of the variation in temperature, moisture, slop and thickness of soil.

Question 5.For fun.Q(i) Collect pictures and photographs of forests and grasslands of different parts of world. Write one sentence below each picture.Q(ii) Make a collage of rain-forest, grassland and coniferous forests.Answer.

Forests and Grasslands

Description

Tropical Evergreen Forests :These forests are also called tropical rain forests.These thick forests occur in the region near the equator and close to the tropics.

Tropical Deciduous Forests:
Tropical deciduous forests are the monsoon forests found in the large part of India,northern Australia and in central America.These regions experience seasonal changes.

Temperate Evergreen Forests:
The temperate evergreen forests are located in the mid-latitudinal coastal region.They are commonly found along the eastern margin of the continents.

Temperate Deciduous Forests:
As we go towards higher latitudes,there are more temperate deciduous forests.These are found in the north eastern part of USA, China, Newzealand,Chile and also found in costal regions of Western Europe.They shed their leaves in the dry season.

Grasslands:
These occur on either side of the equator and extend till the tropics.These vegetation grows in the areas of moderate to low amount of rainfall.

Coniferous Forest:In the higher latitudes(500-700) of Northern hemisphere the spectacular Coniferous forests are found.These are also called as Taiga.These forests are also seen in the higher altitudes.

Intext Questions

Page No. 39Question. Now can you tell why Salima saw changes in the natural vegetation as she climbed higher and higher? What type of vegetation did she see in the Himalayas
starting with the foothills and going to the higher altitudes?Answer. Salima saw changes in the natural vegetation as she climbed higher and higher due to change in height, and related climatic condition such as temperature,
precipitation, low air density along with change in soil form.
At the foothills, Salima sa deep jungles of Sal and Teak. As she climbed higher, she could she coniferous trees such as Pines on the mountain slopes. And at higher
altitudes, she found land was covered with short grass and snow.